Crawler set global proxy: Python crawler global proxy IP setup method and practices

Crawling and being counter-crawled? Try this global proxy trick

What brothers do crawlers most afraid of, IP was blocked absolutely ranked the first three! Today, I'm going to teach you a great skill--Global Proxy SettingsThis is a great way to make all web requests go through the proxy channel automatically. This trick can make all network requests automatically take the proxy channel, than in the code one by one to add the proxy parameters to save a lot of work. Don't worry about spending a lot of money, let's use ipipgo's proxy IP, low cost and good results.

Why use a global proxy?

Ordinary proxies are like temporary laborers, each request is individually accounted for where to work. A global proxy is a contractor, and all requests are automatically assigned work. It's a good fit:
1. Need to multi-threaded crawling to save the trouble of configuring one by one
2. Dynamic IP switching without changing the code logic
3. No need to modify the original code when interfacing with third-party libraries

 As an example: a normal proxy setup
import requests
proxies = {'http': 'http://username:password@ip:port'}
requests.get('http://example.com', proxies=proxies)

 The global proxy does this directly (we'll teach the exact method later)
requests.get('http://example.com') automatically goes proxies

Practical Python Global Proxy Triple Axe

The first move: the great law of environment variables
Ideal for ad hoc testing or simple scenarios, add these two lines to the code:

import os
os.environ['HTTP_PROXY'] = 'http://用户名:密码@ProxyIP:Port'
os.environ['HTTPS_PROXY'] = 'http://用户名:密码@ProxyIP:Port'

Tip #2: Requests Library Global Configuration
Older drivers love to use a solid solution, remember to use ipipgo's socks5 protocol is more stable:

import requests
session = requests.Session()
session.proxies = {
    'http': 'socks5://user:pass@ip:port',
    'https': 'socks5://user:pass@ip:port'
}
 After that, all session requests automatically go through the proxy

Tip #3: urllib ultimate program
Ideal for scenarios that require fine-grained control, such as automatically changing IP pools:

import urllib.request
proxy_handler = urllib.request.ProxyHandler({
    'http': 'http://user:pass@ip:port',
    'https': 'http://user:pass@ip:port'
})
opener = urllib.request.build_opener(proxy_handler)
urllib.request.install_opener(opener) takes effect globally

How to use ipipgo proxy smoothly?

Recommend hisDynamic Residential (Standard) Package, 7+ bucks for 1 G lasts a long time. Highlight a few practical tips:
1. Use the API to extract the IP with a country parameter (e.g. &country=us) to pinpoint the location.
2. Call the IP replacement interface before each request, with the global proxy automatic switching
3. Don't fight with the CAPTCHA, change the IP of the static residence and you may pass.

Guidelines on demining of common problems

Q: Why do I still get blocked after setting up a proxy?
A: It may be that the IP quality is not good, change ipipgo TK line to try. In addition, pay attention to the frequency of requests, do not take the other servers as their own hard disk.

Q: What should I do if the agent suddenly fails?
A: Add an exception retry mechanism in the code, and contact ipipgo customer service at the same time, they respond faster than a delivery boy.

Q: How to solve the problem of slow access to overseas websites?
A: With his family cross-border line, remember to choose the node close to the target server. For example, climbing the United States website to choose the Los Angeles server room.

Finally give a piece of advice: do not be cheap with a free agent, light data is not allowed, heavy account is blocked. ipipgo new users first single discount, than to buy milk tea is still cost-effective. Setting up any jam, directly to their technical small brother, I heard that they can also remotely assist in the configuration.